JPH11336049A - Device for improving ground around trough pipe - Google Patents
Device for improving ground around trough pipeInfo
- Publication number
- JPH11336049A JPH11336049A JP14313298A JP14313298A JPH11336049A JP H11336049 A JPH11336049 A JP H11336049A JP 14313298 A JP14313298 A JP 14313298A JP 14313298 A JP14313298 A JP 14313298A JP H11336049 A JPH11336049 A JP H11336049A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- injection
- ground
- tube
- gutter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Revetment (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、樋管内から樋管周
りの地盤中に３６０°の全範囲に亘って地盤改良部を造
成することが出来る地盤改良装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil improvement device capable of forming a ground improvement portion over a whole range of 360.degree.
【０００２】[0002]
【従来の技術】従来、堤防を貫通する樋管を布設するに
際し、樋管を地中推進工法を適用して継ぎ足しながら布
設し、布設後、樋管の途中に予め介装しておいた分割リ
ングを解体し除去することにより環状開口を形成し、該
環状開口からのグラウト注入により樋管周りの地盤を改
良した後に、該改良部が未硬化の状態にある間に、その
内部に止水板を埋入設置する工法が提案されている（例
えば特許第２６２７８１５号公報参照）。2. Description of the Related Art Conventionally, when laying a gutter pipe that penetrates an embankment, the gutter pipe is laid while being added by applying an underground propulsion method, and after the laying, a division that is previously interposed in the middle of the gutter pipe is installed. An annular opening is formed by disassembling and removing the ring, and after the ground around the gutter pipe is improved by grout injection from the annular opening, while the improved portion is in an unhardened state, water is stopped therein. A construction method of embedding and installing a plate has been proposed (for example, see Japanese Patent No. 2627815).
【０００３】[0003]
【発明が解決しようとする課題】作業スペースに制限を
受けない施工現場に於いて、グラウト注入により地盤改
良を行う場合には、信頼性の高い地盤改良部を造成する
ために、通常、地盤内挿入の注入管をステップアップ
（又はステップダウン）しつつグラウトを各ステップ位
置で地盤内に注入する、所謂ステップ注入手段が適用さ
れている。ところが、樋管内から樋管周りの地盤を改良
する場合、樋管の口径は通常1〜２m程度のものであり、
作業スペースに厳しい制限を受けるので、ステップ注入
手段の適用は到底無理である。従って、従来では、上記
特許公報に見られるように、樋管途中の環状開口から適
宜の注入手段を適用して地盤内に地盤改良材を直接注入
充填するという手段がとられているが、これでは注入さ
れたグラウトが地盤内で広範囲に拡散してしまい、地盤
改良部が信頼性に乏しいものとなり、その改善が望まれ
ていた。When the ground is improved by grouting at a construction site where the working space is not limited, usually a ground improvement is performed in order to create a highly reliable ground improvement part. A so-called step injection means is used in which grout is injected into the ground at each step position while stepping up (or stepping down) the injection tube for insertion. However, when improving the ground around the gutter pipe from inside the gutter pipe, the diameter of the gutter pipe is usually about 1-2 m,
Due to severe restrictions on the working space, the application of the step injection means is almost impossible. Therefore, conventionally, as seen in the above-mentioned patent publication, a means of directly injecting and filling the ground improvement material into the ground by applying appropriate injection means from the annular opening in the middle of the gutter pipe has been adopted. In such a case, the injected grout diffuses widely in the ground, and the ground improvement part becomes poor in reliability, and improvement thereof has been desired.
【０００４】本発明は、樋管内という制限された作業ス
ペース内での作業であるに拘わらずステップ注入手段の
適用が可能な地盤改良装置を提供することを目的として
なされたものである。An object of the present invention is to provide a ground improvement apparatus to which a step injecting means can be applied irrespective of an operation in a limited working space such as a gutter pipe.
【０００５】[0005]
【課題を解決するための手段】本発明は、堤防に貫通布
設の樋管内から、該樋管途中に形成の開口部を通じて、
樋管周りの地盤に３６０°の全範囲に亘って地盤改良部
を造成するための地盤改良装置であって、樋管内を管軸
方向に走行移動可能な台車、台車を第１駆動装置の作動
をして任意の走行移動位置で拘束できる第１拘束機構、
台車上に、樋管の略々中心軸線上に位置するように設置
されていて、第２駆動装置の作動をして間歇回転を受け
る駆動軸、樋管内に於いて、駆動軸と一体間歇回転が可
能であって、前端側の出入り口が管径方向にまた後端側
の挿入口が管軸方向にそれぞれ開口する略々９０°湾曲
の挿通路を備え、挿通路の出入り口は、駆動軸との一体
間歇回転により管軸と直交する同一垂直面内で３６０°
の全範囲に亘って回動変位が可能な管ベンダー、管ベン
ダーを第３駆動装置の作動をして任意の回動変位位置で
拘束できる第２拘束機構、管ベンダーの挿通路内への後
端側から前端側に向かう強制的押し通しにより管軸方向
から管径方向への曲げ加工を受ける金属製注入管、管ベ
ンダーの後端側に一体に接続していて、台車を樋管内に
拘束した状態で、管ベンダーの挿通路に対する上記注入
管の強制的押し込みと強制的引き抜きを行うことが出来
る押し込み・引き抜き装置、とを備え、上記注入管は管
ベンダーの挿通路内への強制的押し通しにより管軸方向
から管径方向への曲げ加工を受けながら樋管途中の開口
部を経て樋管周りの地盤内に挿入が可能であり、また強
制的引き抜きにより地盤内挿入位置から樋管内への退去
が可能であり、上記注入管の地盤内への挿入時及び/又
は退去時に該注入管の先端部の注入孔より地盤内に地盤
改良材をステップ注入できる構成になっている、ことを
特徴とする樋管周りの地盤改良装置に係る。SUMMARY OF THE INVENTION According to the present invention, there is provided a gutter pipe penetrating a dike from a gutter pipe through an opening formed in the middle of the gutter pipe.
A ground improvement device for forming a ground improvement portion over the entire range of 360 ° on the ground around a gutter pipe, wherein the bogie is capable of traveling and moving in the pipe axis direction in the gutter pipe, and the bogie is operated by a first drive device. A first restraining mechanism capable of restraining at any traveling position
A drive shaft that is installed on the trolley so as to be located substantially on the center axis of the gutter tube, and that receives the intermittent rotation by operating the second driving device. It is possible to provide a substantially 90 ° curved insertion passage in which a front end side entrance and exit opening in the tube radial direction and a rear end side insertion opening in the tube axial direction, respectively. 360 ° in the same vertical plane perpendicular to the pipe axis by the integral intermittent rotation of
A pipe bender that can be rotationally displaced over the entire range of the pipe bender, a second restraining mechanism that can restrict the pipe bender at an arbitrary rotational displacement position by operating a third driving device, A metal injection pipe subjected to bending from the pipe axis direction to the pipe diameter direction by forcible penetration from the end side to the front end side, integrally connected to the rear end side of the pipe bender, restraining the bogie in the gutter pipe A pushing / pulling-out device capable of forcibly pushing and forcibly pulling the injection tube into and out of the insertion passage of the tube bender, wherein the injection tube is forcibly pushed into the insertion passage of the tube bender. While being bent from the pipe axis direction to the pipe diameter direction, it can be inserted into the ground around the gutter pipe through the opening in the middle of the gutter pipe, and withdrawal from the insertion position in the ground into the gutter pipe by forced pulling out Is possible and on A ground around a gutter pipe, wherein a ground improvement material is step-injected into the ground from an injection hole at a tip end of the injection pipe when the injection pipe is inserted into the ground and / or when the injection pipe is withdrawn. It relates to an improved device.
【０００６】[0006]
【発明の実施の形態】以下に本発明の一実施形態を添付
図面にもとづき説明すると次の通りである。本発明地盤
改良装置は、図１に示すように、樋管ａ内で管軸方向に
走行移動可能な台車１を具備し、該台車１の走行移動
は、自走により或いはロープ（図示せず）による牽引操
作により行うことが出来る。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the ground improvement apparatus of the present invention includes a bogie 1 that can travel in a pipe axis direction in a gutter pipe a, and the traveling movement of the bogie 1 is caused by self-propelled or rope (not shown). ) Can be performed by the towing operation.
【０００７】台車１上には、該台車１を任意の走行移動
位置で拘束するための第１拘束機構２が備えられてい
る。A first restraining mechanism 2 for restraining the carriage 1 at an arbitrary traveling position is provided on the carriage 1.
【０００８】図１には、第１拘束機構２として、第１駆
動装置２ａ（例えばシリンダ装置）の作動をして管径方
向に進退移動可能な固定部材２ｂから構成した場合が示
され、固定部材２ｂが、図１に示すように、退去位置に
あるときは、台車１は管内からフリーとなり自由に走行
移動でき、一方図２に示すように、進出位置にあるとき
は樋管ａ内面に当止しその反力で台車１の左右一対,前
後３組の車輪１ａ,１ａを樋管ａ内面に強く押し付け、
台車１を管内に拘束する。図１では、第１拘束機構２を
台車１上の前後２箇所に設置した場合が示されている
が、設置数は特に制限されない。FIG. 1 shows a case where the first restraining mechanism 2 is constituted by a fixing member 2b which can be moved in the radial direction by operating a first driving device 2a (for example, a cylinder device). When the member 2b is at the retreat position as shown in FIG. 1, the bogie 1 is free from inside the pipe and can travel freely, while as shown in FIG. With the reaction force, the pair of right and left wheels 3a and 3a front and rear wheels 1a of the carriage 1 are strongly pressed against the inner surface of the gutter pipe a,
The carriage 1 is restrained in the pipe. FIG. 1 shows a case where the first restraining mechanism 2 is installed at two front and rear positions on the carriage 1, but the number of installations is not particularly limited.
【０００９】台車１の台座１ａには、駆動軸３が樋管ａ
の略々中心軸線上に位置するように貫通設置され、該駆
動軸３は前端側に設置の第２駆動装置４（例えばステッ
ピングモータ）の作動をして中心軸線周りの方向に間歇
回転を受ける構成になっている。A drive shaft 3 is attached to a pedestal 1a of the carriage 1 by a gutter pipe a.
The drive shaft 3 is intermittently rotated in a direction around the center axis by operating a second drive device 4 (for example, a stepping motor) installed at a front end side of the drive shaft 3 so as to be positioned substantially on the center axis. It has a configuration.
【００１０】駆動軸３の後端側は台車１の後端より後方
へ突出し、この突出端部３ａに、該駆動軸３と一体間歇
回転可能な管ベンダー５が支持部材６を介し取り付け固
定されている。該支持部材６上には、管ベンダー５を任
意の間歇回転位置で拘束するための第２拘束機構７が、
相反する向きに一対設置されている。第２拘束機構７は
第１拘束機構２と同様に、第３駆動装置７ａ（例えばシ
リンダ装置）の作動をして管径方向に往復移動可能な固
定部材７ｂから構成することが出来る。The rear end of the drive shaft 3 protrudes rearward from the rear end of the bogie 1, and a tube bender 5 that can be intermittently rotated with the drive shaft 3 is attached and fixed to the protruding end 3 a via a support member 6. ing. On the support member 6, a second restraining mechanism 7 for restraining the tube bender 5 at any intermittent rotation position is provided.
A pair is installed in opposite directions. Similarly to the first restraining mechanism 2, the second restraining mechanism 7 can be constituted by a fixed member 7b that can reciprocate in the pipe diameter direction by operating a third driving device 7a (for example, a cylinder device).
【００１１】管ベンダー５は、略々９０°湾曲する挿通
路５ａを備え、該挿通路５ａの前端側は管径方向に開口
し下記注入管８の出入り口５ｂを構成し、一方後端側は
管軸方向に開口し注入管８の挿入口５ｃを構成してい
る。出入り口５ｂは、管ベンダー５の間歇回転により、
樋管ａの管軸と直交する同一垂直面内で管周りの方向に
回動変位し、この回動変位により、出入り口５ｂの向き
を３６０°の全範囲に亘って調整することが出来る。The pipe bender 5 has an insertion passage 5a which is bent approximately 90 °. The front end side of the insertion passage 5a opens in the pipe radial direction to form an inlet / outlet 5b of the injection pipe 8 described below, while the rear end side thereof is provided. The opening 5c opens in the tube axis direction and forms an insertion port 5c of the injection tube 8. The entrance 5b is intermittently rotated by the pipe bender 5,
The gutter pipe a is rotationally displaced in the direction around the pipe in the same vertical plane orthogonal to the pipe axis, and the direction of the entrance 5b can be adjusted over the entire range of 360 ° by this rotational displacement.
【００１２】管ベンダー５の挿通路５ａ内には、図５に
示すように、挿入口５ｃから出入り口５ｂに向けて金属
製の注入管８が強制的に押し通され、この押し通しによ
り、注入管８を管軸方向から管径方向に曲げ加工するこ
とが出来る。注入管８の挿通路５ａ内での通過性を改善
するために、挿通路５ａの両側に、ガイドローラ９の多
数を列をなすように設置することが出来る。As shown in FIG. 5, a metal injection pipe 8 is forcibly pushed from the insertion port 5c to the entrance 5b in the insertion passage 5a of the pipe bender 5. 8 can be bent in the pipe diameter direction from the pipe axis direction. In order to improve the passage of the injection pipe 8 in the insertion passage 5a, a large number of guide rollers 9 can be arranged in rows on both sides of the insertion passage 5a.
【００１３】管ベンダー５の後端側（挿入口５ｃ側）
に、押し込み・引き抜き装置１０が一体に接続されてい
る。The rear end side of the tube bender 5 (the insertion port 5c side)
The push-in / pull-out device 10 is integrally connected.
【００１４】押し込み・引き抜き装置１０は注入管８を
管ベンダー５の挿通路５ａに対し強制的に押し込み、ま
たは挿通路５ａ内から強制的に引き抜くためのものであ
り、管の強制的押し込み・引き抜きに適用されている公
知の各種の構成のものを採用できる。The push-in / pull-out device 10 is for forcibly pushing the injection tube 8 into the insertion passage 5a of the tube bender 5 or forcibly pulling out the injection tube 5a from the inside of the insertion passage 5a. Any of various known configurations applied to the above can be adopted.
【００１５】図１に示された押し込み・引き抜き装置１
０は、注入管８挿通用のセンターホール１０ａを備えた
ピストン・シリンダー装置１０Ａと、該装置１０Ａの作
動をして所定のストロークでピストンロッド１０ｂと一
体に前後方向に往復移動するチャック装置１０Ｂとを備
え、センターホール１０ａは管ベンダー５の挿入口５ｃ
に管軸方向に一線に接続している。チャック装置１０Ｂ
により注入管８をチャックした状態でピストン・シリン
ダー装置１０Ａの作動をしてチャック装置１０Ｂを前方
に向け移動させると、一作動毎に、注入管８はピストン
・シリンダ装置１０Ａの一ストローク分、前方へ送ら
れ、管ベンダー５に順次押し込まれて行く。これとは逆
に、チャック装置１０Ｂを、注入管８をチャックした状
態で後方に向け移動させると、一作動毎に、注入管８は
ピストンシリンダ装置１０Ａの一ストローク分、後方へ
送られ、管ベンダー５から順次引き抜かれて行く。Push-in / pull-out device 1 shown in FIG.
Reference numeral 0 denotes a piston / cylinder device 10A having a center hole 10a for inserting the injection pipe 8, and a chuck device 10B which operates the device 10A to reciprocate back and forth integrally with the piston rod 10b at a predetermined stroke. The center hole 10a is provided with an insertion opening 5c for the tube bender 5.
Are connected in a straight line in the pipe axis direction. Chuck device 10B
When the piston / cylinder device 10A is actuated to move the chuck device 10B forward while the injection tube 8 is chucked, the injection tube 8 is moved forward by one stroke for each operation of the piston / cylinder device 10A. , And are sequentially pushed into the tube bender 5. Conversely, when the chuck device 10B is moved rearward while the injection tube 8 is chucked, the injection tube 8 is sent rearward by one stroke of the piston cylinder device 10A for each operation, It is sequentially extracted from vendor 5.
【００１６】押し込み・引き抜き装置１０作動による注
入管８の押し込み又は引き抜き時には、その押し込み又
は引き抜き力を支えるために、上記台車１が第１拘束機
構２の働きで樋管ａ内にしっかりと拘束固定される。When the injection tube 8 is pushed or pulled out by the operation of the pushing / pulling device 10, the carriage 1 is firmly restrained and fixed in the gutter pipe a by the operation of the first restraining mechanism 2 in order to support the pushing or pulling force. Is done.
【００１７】注入管８は押し込み・引き抜き装置１０の
作動をして地中を推進するために金属製であることが必
要である。注入管８は、図３に示すように、曲げ加工を
受ける前部側８ａと受けない後部８ｂを備え、前部８ａ
は繰り返しの曲げ加工に耐えるために、例えば冷間引き
抜き加工から得られた鋼管,ステンレス管、銅（合金を
含む）管等の１本物から構成され、後部８ｂは金属製定
尺管８ｂ1を順次継ぎ足して構成すればよい。The injection pipe 8 needs to be made of metal in order to operate the pushing / pulling-out device 10 and to propel it underground. As shown in FIG. 3, the injection pipe 8 includes a front side 8a to be bent and a rear part 8b not to be bent.
Is made of a single material such as a steel pipe, a stainless steel pipe, or a copper (including alloy) pipe obtained by cold drawing in order to withstand repeated bending, and the rear part 8b is a metal fixed length pipe 8b 1 sequentially. What is necessary is just to add and configure.
【００１８】堤防に貫通敷設された樋管ａの途中には、
分割除去可能な分割リングｂが介装されており、該分割
リングｂには、多数の挿通口ｃが管周りの方向に間隔を
存して並列するように穿設されている。挿通口ｃは使用
対象の１つ、例えば、図１に於いては、頂部の挿通口ｃ
が開栓され、その他は全てプラグ（図示せず）により閉
栓されている。挿通口ｃは、図示のように必ずしも個々
に独立している必要はなく、分割リングｂを取り外した
跡に形成される環状開口を挿通口ｃとして利用しても良
い。In the middle of the gutter pipe a laid through the embankment,
A split ring b that can be split and removed is interposed, and a large number of insertion ports c are formed in the split ring b so as to be arranged side by side in the direction around the pipe with an interval. The insertion port c is one of the objects to be used, for example, in FIG.
Are plugged, and all others are plugged with plugs (not shown). The insertion openings c do not necessarily have to be individually independent as shown in the figure, and an annular opening formed at the mark where the split ring b is removed may be used as the insertion opening c.
【００１９】地盤改良の施工に際しては、図４に概略的
に示すように、先ず台車１の管内移動により管ベンダー
５の挿通路５ａの出入り口５ｂと分割リングｂ上の挿通
口ｃとの管軸方向の位置合わせを行い、位置合わせ後、
台車１を第１拘束機構２の作動をして管内に拘束する。
次に駆動装置４の作動をして駆動軸３を介し管ベンダー
５を間歇回転し管周り方向の位置合わせを行い、開口状
態にある頂部挿通口ｃに管ベンダー５の出入り口５ｂを
一致させ、しかる後、第２拘束機構７の作動をして管ベ
ンダー５を管内に拘束する。At the time of the ground improvement, as shown schematically in FIG. 4, the bogie 1 is first moved in the pipe so that the pipe axis between the entrance 5b of the insertion passage 5a of the pipe bender 5 and the insertion port c on the split ring b is formed. Direction alignment, and after alignment,
The cart 1 is restrained in the pipe by operating the first restraining mechanism 2.
Next, the drive unit 4 is operated to intermittently rotate the tube bender 5 via the drive shaft 3 to perform alignment around the tube, so that the entrance 5b of the tube bender 5 coincides with the top insertion opening c in the open state. Thereafter, the second restraining mechanism 7 is operated to restrain the pipe bender 5 in the pipe.
【００２０】次に、図５に示すように、注入管８（図２
参照）を押し込み・引き抜き装置１０のセンターホール
１０ａを経て管ベンダー５の挿通路５ａの挿入口５ｃま
で挿入した後に、該装置１０の作動をして注入管８を管
ベンダー５の挿通路５ａ内に強制的に押し込んで行く
と、挿通路５ａの９０°の湾曲により、注入管８は管軸
方向（横方向）から管径方向（縦方向）に曲げ加工を受
けながら該挿通路５ａの出入り口５ｂ及びこれと一致し
ている挿通口ｃを経て樋管ａ周りの地盤中に挿入されて
行き、この挿入は、所定深度、例えば２〜３ｍ程度の挿
入深さに達するまで継続され、その後、停止される。Next, as shown in FIG. 5, the injection tube 8 (FIG. 2)
After insertion into the insertion hole 5c of the insertion passage 5a of the tube bender 5 through the center hole 10a of the pushing / pulling-out device 10, the device 10 is operated to move the injection pipe 8 into the insertion passage 5a of the tube bender 5. When the injection pipe 8 is forcibly pushed in, the injection pipe 8 is bent from the pipe axial direction (lateral direction) to the pipe radial direction (vertical direction) by the 90 ° bending of the insertion path 5a, and the inlet and outlet of the insertion path 5a are bent. 5b and the insertion hole c corresponding thereto are inserted into the ground around the gutter pipe a, and this insertion is continued until a predetermined depth, for example, an insertion depth of about 2 to 3 m is reached, and thereafter, Stopped.
【００２１】次に、図６に示すように、注入管８の後端
側から地盤改良材、例えばセメントミルクを供給しつつ
該改良材を注入管８の先端部の注入孔を通じ地盤内に注
入充填し、以下注入管８を、押し込み・引き抜き装置１
０の作動をして樋管ａ内に向かう引き抜きによりステッ
プアップしつつ各ステップ位置で注入を行うことによ
り、１つの挿通口ｃでのステップ注入を終了する。Next, as shown in FIG. 6, the ground improving material, for example, cement milk is supplied from the rear end side of the injection pipe 8 and the improved material is injected into the ground through the injection hole at the tip end of the injection pipe 8. After filling, the injection tube 8 is pushed and pulled out of the device 1
By performing the operation at 0 and performing the injection at each step position while stepping up by pulling out toward the inside of the gutter tube a, the step injection at one insertion port c is completed.
【００２２】１つの挿通口ｃでのステップ注入を終えた
後は、使用済みの挿通口ｃを閉栓する一方、他の１つの
挿通口ｃを開栓し、開栓された新しい挿通口ｃと管ベン
ダー５の出入り口５ｂとの管周り方向の位置合わせと、
位置合わせ状態での拘束を終えた後に、該挿通口ｃを利
用して先と同じ要領で地盤改良を行うことにより、図７
に示すように、地盤改良部を管周りの方向に一ピッチ拡
大できる。After the step injection at one insertion port c is completed, the used insertion port c is closed, while the other insertion port c is opened, and the opened new insertion port c is opened. Positioning of the pipe bender 5 with the entrance 5b in the direction around the pipe,
After the restraint in the aligned state is completed, the ground improvement is performed by using the insertion port c in the same manner as described above, thereby obtaining FIG.
As shown in (1), the ground improvement portion can be enlarged by one pitch in the direction around the pipe.
【００２３】以下同様に、挿通口ｃからの地盤改良を、
管周り方向に並列する各々の挿通口ｃを利用して管周り
方向に一ピッチずつ連続させて行くことにより、樋管ａ
の周りに３６０°全範囲に亘って連続する地盤改良部を
造成することが出来る。Similarly, the ground improvement from the insertion port c
By making use of each of the insertion ports c arranged in parallel in the pipe circumferential direction and continuing one pitch at a time in the pipe circumferential direction, the gutter pipe a
The ground improvement part which is continuous over the entire range of 360 ° can be created.
【００２４】このようにして造成された地盤改良部はス
テップ注入手段が適用されているので、信頼性の高いも
のとなる。The ground improvement section constructed in this manner is highly reliable because the step injecting means is applied.
【００２５】本発明に於いては、固い地盤に対する対策
として、図８に示すように、注入管８に先端ビット１１
を備えるようにしてもよい。この場合、注入管８は金属
外管８Ａとフレキシブル内管８Ｂとの２重管構成とせら
れ、フレキシブル内管８Ｂに先端ビット１１が備えら
れ、該内管８Ｂを駆動装置（図示せず）の作動をして回
転することにより先端ビット１１に回転を与えることが
出来る構成になっている。In the present invention, as a countermeasure against hard ground, as shown in FIG.
May be provided. In this case, the injection pipe 8 has a double pipe configuration of a metal outer pipe 8A and a flexible inner pipe 8B, and the flexible inner pipe 8B is provided with a tip bit 11, and the inner pipe 8B is connected to a driving device (not shown). By operating and rotating, the tip bit 11 can be rotated.
【００２６】２重管構成の注入管８は内管８Ｂ内と内外
管８Ｂ,８Ａとの間に内外通路１２,１３を備え、これら
通路１２,１３は注入管８の地盤内への挿入時には削孔
水の供給通路として使用され、また、ステップ注入時に
は、主剤と硬化材の注入通路として使用される。The injection pipe 8 having a double pipe structure has inner and outer passages 12, 13 between the inner pipe 8B and the inner and outer pipes 8B, 8A, and these passages 12, 13 are used when the injection pipe 8 is inserted into the ground. It is used as a supply passage for drilling water, and is used as a supply passage for the main agent and the hardening material during step injection.
【００２７】先端ビット１１は、内管８Ｂの内通路１２
に一線に連なる主通路１４と該主通路１４からの分岐通
路１５とを備え、これら通路１４,１５は削孔時はいず
れも削孔水の供給通路として使用されるが、ステップ注
入時には、図８に破線で示すように、ボール弁１６の填
入により、主通路１４は閉じられ、分岐通路１５だけが
液剤の注入通路として使用される。図中、１７は外通路
１３先端の噴孔である。The tip bit 11 is connected to the inner passage 12 of the inner pipe 8B.
The main passage 14 and a branch passage 15 from the main passage 14 are provided.The passages 14 and 15 are used as drilling water supply passages during drilling. As shown by the broken line in FIG. 8, the main passage 14 is closed by the filling of the ball valve 16, and only the branch passage 15 is used as a liquid agent injection passage. In the figure, reference numeral 17 denotes an injection hole at the tip of the outer passage 13.
【００２８】[0028]
【発明の効果】本発明地盤改良装置によれば、樋管内か
ら、樋管周りの地盤を注入管利用のステップ注入手段を
適用して改良することが可能になり、信頼性の高い地盤
改良部を造成することができる。According to the ground improvement apparatus of the present invention, the ground around the gutter pipe can be improved from the inside of the gutter pipe by applying the step injection means using the injection pipe, and the ground improvement section having high reliability can be obtained. Can be created.
【図１】本発明の一実施形態を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.
【図２】台車を樋管内で拘束した状態を示す説明図であ
る。FIG. 2 is an explanatory view showing a state in which a bogie is restrained in a gutter tube.
【図３】金属注入管の側面図である。FIG. 3 is a side view of a metal injection tube.
【図４】本発明装置の台車及び管ベンダーを樋管内に拘
束した状態を示す説明図である。FIG. 4 is an explanatory view showing a state in which a bogie and a pipe bender of the apparatus of the present invention are restrained in a gutter pipe.
【図５】金属注入管を樋管周りの地盤内に管径方向から
挿入した状態を示す説明図である。FIG. 5 is an explanatory view showing a state in which a metal injection pipe is inserted into a ground around a gutter pipe from a pipe radial direction.
【図６】ステップ注入している状況を示す説明図であ
る。FIG. 6 is an explanatory diagram showing a situation in which step injection is performed.
【図７】ステップ注入を管周りの方向に繰り返し実施し
ている状況を示す説明図である。FIG. 7 is an explanatory diagram showing a situation in which step injection is repeatedly performed in a direction around a pipe.
【図８】２重管構成の注入管の先端部の拡大縦断面図で
ある。FIG. 8 is an enlarged vertical sectional view of a distal end portion of an injection pipe having a double pipe configuration.
１ 台車 １ａ 台座 ２ 第１拘束機構 ２ａ シリンダ装置 ２ｂ ブレーキ部材 ３ 駆動軸 ３ａ 突出端部 ４ 駆動装置 ５ 管ベンダー ５ａ 湾曲挿通路 ５ｂ 出入り口 ５ｃ 挿入口 ６ 支持部材 ７ 第２拘束機構 ７ａ シリンダ装置 ７ｂ ブレーキ部材 ８ 金属注入管 ８ａ 金属注入管の全部側 ８ｂ 同、後部側 ９ ガイドロール １０ 押し込み・引き抜き装置 Reference Signs List 1 cart 1a pedestal 2 first restraining mechanism 2a cylinder device 2b brake member 3 drive shaft 3a protruding end 4 drive device 5 pipe bender 5a curved insertion passage 5b doorway 5c insertion opening 6 support member 7 second restraining mechanism 7a cylinder device 7b brake Member 8 Metal injection tube 8a All sides of metal injection tube 8b Same, rear side 9 Guide roll 10 Push-in / pull-out device
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小野里 恒之 東京都中央区新川一丁目８番８号 株式会 社クボタ建設内 (72)発明者 宮川 恒夫 東京都中央区新川一丁目８番８号 株式会 社クボタ建設内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tsuneyuki Onosato 1-8-8 Shinkawa, Chuo-ku, Tokyo Inside Kubota Construction Co., Ltd. (72) Inventor Tsuneo Miyagawa 1-8-8 Shinkawa, Chuo-ku, Tokyo No. Kubota Construction Co., Ltd.
Claims (1)
に形成の開口部を通じて、樋管周りの地盤に３６０°の
全範囲に亘って地盤改良部を造成するための地盤改良装
置であって、 樋管内を管軸方向に走行移動可能な台車、 台車を第１駆動装置の作動をして任意の走行移動位置で
拘束できる第１拘束機構、 台車上に、樋管の略々中心軸線上に位置するように設置
されていて、第２駆動装置の作動をして間歇回転を受け
る駆動軸、 樋管内に於いて、駆動軸と一体間歇回転が可能であっ
て、前端側の出入り口が管径方向にまた後端側の挿入口
が管軸方向にそれぞれ開口する略々９０°湾曲の挿通路
を備え、挿通路の出入り口は、駆動軸との一体間歇回転
により管軸と直交する同一垂直面内で３６０°の全範囲
に亘って回動変位が可能な管ベンダー、 管ベンダーを第３駆動装置の作動をして任意の回動位置
で拘束できる第２拘束機構、 管ベンダーの挿通路内への後端側から前端側に向かう強
制的押し通しにより管軸方向から管径方向への曲げ加工
を受ける金属製注入管、 管ベンダーの後端側に一体に接続していて、台車を樋管
内に拘束した状態で、管ベンダーの挿通路に対する上記
注入管の強制的押し込みと強制的引き抜きを行うことが
出来る押し込み・引き抜き装置、とを備え、 上記注入管は管ベンダーの挿通路内への強制的押し通し
により管軸方向から管径方向への曲げ加工を受けながら
樋管途中の開口部を経て樋管周りの地盤内に挿入が可能
であり、また強制的引き抜きにより地盤内挿入位置から
樋管内への退去が可能であり、上記注入管の地盤内への
挿入時及び/又は退去時に該注入管の先端部の注入孔よ
り地盤内に地盤改良材をステップ注入できる構成になっ
ている、ことを特徴とする樋管周りの地盤改良装置。1. A ground improvement device for forming a ground improvement part over a full 360 ° range in the ground around a gutter pipe from inside a gutter pipe laid through the embankment through an opening formed in the middle of the gutter pipe. A truck capable of traveling in the pipe axis direction in the gutter pipe, a first restraining mechanism capable of restricting the carriage at an arbitrary traveling position by operating the first drive device, A drive shaft that is installed so as to be located on the center axis and receives intermittent rotation by operating the second drive device. In the gutter pipe, intermittent rotation with the drive shaft is possible. An entrance and exit are provided in the tube diameter direction, and a rear end side insertion opening is provided with an insertion passage of approximately 90 ° curved opening in the tube axis direction, and the entrance and exit of the insertion passage are orthogonal to the tube axis by intermittent rotation with the drive shaft. Tube bender capable of rotating and displacing over the entire range of 360 ° in the same vertical plane A second restraining mechanism capable of restraining the pipe bender at an arbitrary rotational position by operating a third driving device; from a pipe axial direction by forcibly pushing the pipe bender from the rear end side to the front end side into the insertion passage of the pipe bender; A metal injection pipe subjected to bending in the pipe diameter direction, which is integrally connected to the rear end side of the pipe bender, and forcing the injection pipe into the insertion path of the pipe bender while the bogie is restrained in the gutter pipe. A push-in / pull-out device capable of performing push-in and forcible withdrawal, wherein the injection pipe is bent while being bent from the pipe axial direction to the pipe radial direction by forcible penetration into the insertion passage of the pipe bender. It is possible to insert into the ground around the gutter pipe through the opening in the middle of the pipe, and it is possible to withdraw from the insertion position in the ground into the gutter pipe by forced withdrawal, and when inserting the injection pipe into the ground And / or when you leave The soil improvement material into the ground than the injection hole in the tip of the injection tube has a structure that can step injection, soil improvement device around trough tube, characterized in that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14313298A JP2929191B1 (en) | 1998-05-25 | 1998-05-25 | Ground improvement device around gutter pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14313298A JP2929191B1 (en) | 1998-05-25 | 1998-05-25 | Ground improvement device around gutter pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2929191B1 JP2929191B1 (en) | 1999-08-03 |
| JPH11336049A true JPH11336049A (en) | 1999-12-07 |
Family
ID=15331671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14313298A Expired - Fee Related JP2929191B1 (en) | 1998-05-25 | 1998-05-25 | Ground improvement device around gutter pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2929191B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002285785A (en) * | 2001-03-26 | 2002-10-03 | Japan Found Eng Co Ltd | Waterstop and drilling method using it |
| JP2003082977A (en) * | 2001-09-05 | 2003-03-19 | Japan Found Eng Co Ltd | Machine fixing device and hole excavating method using this device |
-
1998
- 1998-05-25 JP JP14313298A patent/JP2929191B1/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002285785A (en) * | 2001-03-26 | 2002-10-03 | Japan Found Eng Co Ltd | Waterstop and drilling method using it |
| JP2003082977A (en) * | 2001-09-05 | 2003-03-19 | Japan Found Eng Co Ltd | Machine fixing device and hole excavating method using this device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2929191B1 (en) | 1999-08-03 |
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